docs: def color_replace(image, color):
      """Replace black with other color
  
      :color: custom color (r,g,b,a)
      :image: image to replace color
      :returns: TODO
  
      """
      pixels = image.load()
      size = image.size[0]
      for width in range(size):
          for height in range(size):
              r, g, b, a = pixels[width, height]
              if (r, g, b, a) == (0,0,0,255):
                  pixels[width,height] = color
              else:
                  pixels[width,height] = (r,g,b,color[3])